Derivative Liabilities and Fair Value Measurements - Derivative Warrant Liabilities Based Upon Sensitivity and Nature of Inputs (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 19, 2020	Mar. 06, 2020
Amount of principal to be converted into common stock			$ 0.525	$ 1.68
Measurement Input, Price Volatility [Member] | B3D Conversion Option
Fair value assumptions rate	89.50%	65.70%
Measurement Input, Price Volatility [Member] | Calm Conversion Option
Fair value assumptions rate	79.10%	66.90%
Measurement Input, Price Volatility [Member] | May 2018 Class A Warrants
Fair value assumptions rate	80.50%	65.20%
Measurement Input, Price Volatility [Member] | Calm Warrants
Fair value assumptions rate	79.10%	66.90%
Measurement Input, Risk Free Interest Rate [Member] | B3D Conversion Option
Fair value assumptions rate	0.22%	1.62%
Measurement Input, Risk Free Interest Rate [Member] | Calm Conversion Option
Fair value assumptions rate	0.28%	1.75%
Measurement Input, Risk Free Interest Rate [Member] | May 2018 Class A Warrants
Fair value assumptions rate	0.37%	1.67%
Measurement Input, Risk Free Interest Rate [Member] | Calm Warrants
Fair value assumptions rate	0.44%	1.62%
Measurement Input, Expected Term [Member] | B3D Conversion Option
Fair value assumptions expected term (in years)	1 year 2 months 1 day	1 year 5 months 1 day
Measurement Input, Expected Term [Member] | Calm Conversion Option
Fair value assumptions expected term (in years)	2 years 2 months 1 day	2 years 4 months 28 days
Measurement Input, Expected Term [Member] | May 2018 Class A Warrants
Fair value assumptions expected term (in years)	3 years 1 month 17 days	3 years 4 months 17 days
Measurement Input, Expected Term [Member] | Calm Warrants
Fair value assumptions expected term (in years)	4 years 3 months 7 days	4 years 6 months 7 days
Measurement Input, Expected Dividend Rate [Member] | B3D Conversion Option
Fair value assumptions rate	0.00%	0.00%
Measurement Input, Expected Dividend Rate [Member] | Calm Conversion Option
Fair value assumptions rate	0.00%	0.00%
Measurement Input, Expected Dividend Rate [Member] | May 2018 Class A Warrants
Fair value assumptions rate	0.00%	0.00%
Measurement Input, Expected Dividend Rate [Member] | Calm Warrants
Fair value assumptions rate	0.00%	0.00%